<h1> Adding planets to simulation <%= @simulation.name %>: </h1>
check to include planet
<% form_for :include_planets,
						:url => { :action => 'save_planets_to_simulation' } do |f| %>
	<% for planet in @system.planets %>
		<%= f.check_box planet.id  %> <%= planet.name %> <br />
	<% end %>
	<%= f.submit "Submit" %>
<% end %>
